Patents by Inventor Aimo E. Jarvinen

Aimo E. Jarvinen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hydrometallurgic method for processing raw materials containing zinc sulphide
    Patent number: 5120353
    Abstract: The invention relates to a method for recovering various valuable materials in connection with the hydrometallurgical production of zinc. The method is particularly suited for feeding different types of raw materials into the various stages of a process carried out in atmospheric conditions. Valuable materials such as lead, silver and gold are recovered by means of the said method.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: June 9, 1992
    Assignee: Outokumpu Oy
    Inventors: Sigmund P. Fugleberg, Aimo E. Jarvinen
  • Flotation recovery of lead, silver and gold as sulfides from electrolytic zinc process residues
    Patent number: 4385038
    Abstract: A process is disclosed for the recovery of lead, silver and gold from the iron-bearing residue of an electrolytic zinc process by froth-flotating a slurry of the iron-bearing residue in the presence of a sulfidic collector agent in order to froth-flotate the sulfides and to separate them from the iron-bearing residue. The iron-bearing residue is sulfidized selectively in order to convert the lead, silver and possibly gold substantially quantitatively to sulfides before the iron-bearing residue is froth-flotated.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: May 24, 1983
    Assignee: Outokumpu Oy
    Inventors: Jussi K. Rastas, Kaarlo M. J. Saari, Vaino V. H. Hintikka, Jaakko O. Leppinen, Aimo E. Jarvinen